Charlie Jane Anders at io9.com asked producer James Middleton if there was still hope that the Terminator fan campaigns would lead to some kind of continuation of the series. This is what he said:
The quick answer is, yes, there have been many discussions. I can’t go into more detail about the subject until I have something truly substantial to report. What the fans should know is that I hear them and I too would love to see T:SCC come back in some form. [io9.com]
So nothing concrete yet, but a producer going on record with this should be enough to create some more hype.